Their explanation of the price is a bit disingenuous though - because to quote:
"Customer pays £18 to shop
Shop gets £15, government gets £3
Shops buys from manufacturer for approx £6.00
From £6 x however many sales, manufacturer has to pay wages, rent, insurance, training, materials, taxes, etc etc and make their own profit so that they can afford to keep going"
But they aren't selling through a shop, but they are selling them on their own through their own website. So actually they get £15 and gvt gets £3 - and they indicate themselves that over £9 of that is profit.
So I can understand why the prices might be higher the more middle men you put in (as more people are trying to make a profit from the sale of the single pair of pants), but that should mean thast when people sell them themselves on their own websites they should be much cheaper...
Unless I am missing something huge.